Feature: Easy to install: No screws or nails needed! Simply stick the doorbell nexts to your door using the included double-sided adhesive tape and plug the receiver into a power outlet. This wireless doorbell set your super-convenient choice for your home and business. Operating range of over 300 meters. (300 meters in open area): Great for large homes, warehouses, offices, and more! Place the doorbell up to 300 meters away from the receiver and still be notified when guests arrive. will not interfere with other equipment in your home or those of your neighbors; ensures you will never miss a visitor, even if you are a few rooms away or on another floor. Adjustable volume: 4-level of volume range from hightest to silcence to meet your needs for different occasions. 32 melodies: The wireless doorbell offers a wide selection of 32 chimes for your personal taste Waterproof: Push button is rated IP55 waterproof, for outdoor use. withstands various harsh weather conditions. Specification: Material: ABS Push button voltage: 12V / 23A Receiver voltage: 220V Color: black, white Size: as shown Include: Choice 1: 1 x Push button 1 x Receiver Choice 2: 2 x Push button 1 x Receiver Package List: Choice 1: 1 x Push button 1 x Receiver Choice 2: 2 x Push button 1 x Receiver